Observation Of A Charmoniumlike Enhancement In The Gamma Gamma ->Omega J/Psi Process

S. Uehara,T. Aushev,A. M. Bakich,K. Belous,V. Bhardwaj, M. Bischofberger,M. Bračko,T. E. Browder,P. Chang,A. Chen,P. Chen,B. G. Cheon,C.-C. Chiang,I.-S. Cho,S.-K. Choi,Y. Choi,J. Dalseno,A. Drutskoy,S. Eidelman,D. Epifanov,M. Feindt,N. Gabyshev,H. Ha,J. Haba,K. Hayasaka, H. Hayashii,Y. Hoshi,W.-S. Hou,Y. B. Hsiung, H. J. Hyun,K. Inami,R. Itoh, M. Iwabuchi,M. Iwasaki,Y. Iwasaki,N. J. Joshi,J. H. Kang, T. Kawasaki,C. Kiesling,H. J. Kim,J. H. Kim,Y. I. Kim,Y. J. Kim,B. R. Ko,P. Kodyš,S. Korpar,P. Križan,P. Krokovny,T. Kumita,A. Kuzmin,Y.-J. Kwon,S.-H. Kyeong,J. S. Lange,M. J. Lee,S.-H. Lee,J. Li,C. Liu,Y. Liu,D. Liventsev,R. Louvot,A. Matyja,S. McOnie, K. Miyabayashi,H. Miyata,Y. Miyazaki,R. Mizuk,R. Mussa,E. Nakano, M. Nakao,H. Nakazawa,Z. Natkaniec,S. Nishida,O. Nitoh,S. Ogawa,T. Ohshima,S. Okuno,S. L. Olsen,P. Pakhlov,G. Pakhlova,C. W. Park,H. Park,H. K. Park,R. Pestotnik,M. Petrič,L. E. Piilonen,M. Röhrken,S. Ryu,H. Sahoo,Y. Sakai,O. Schneider,C. Schwanda,M. E. Sevior,M. Shapkin,C. P. Shen, J.-G. Shiu,B. Shwartz,J. B. Singh,P. Smerkol,E. Solovieva,M. Starič,Y. Teramoto,K. Trabelsi, Y. Unno,S. Uno,P. Urquijo, G. Varner,K. Vervink,C. H. Wang,P. Wang,Y. Watanabe,R. Wedd,E. Won,B. D. Yabsley,Y. Yamashita,C. Z. Yuan, C. C. Zhang,T. Zivko,O. Zyukova

PHYSICAL REVIEW LETTERS（2010）

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摘要

We report the results of a search for a charmoniumlike state produced in the process gamma gamma -> omega J/psi in the 3.9-4.2 GeV = c(2) mass region. We observe a significant enhancement, which is well described by a resonant shape with mass M = (3915 +/- 3 +/- 2_ MeV/c(2) and total width Gamma = (17 +/- 10 +/- 3) MeV. This enhancement may be related to one or more of the three charmoniumlike states so far reported in the 3.90-3.95 GeV= c(2) mass region.

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关键词

elementary particles,gamma radiation,electromagnetic radiation,ionizing radiation

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